A299172 Primes p such that Ramanujan number tau(p) is divisible by p-1.

2, 3, 59, 107

Offset: 1

Author

Seiichi Manyama, Feb 04 2018

Keywords

• nonn
• more

Comments

a(5) > 10^7.

Crossrefs

Cf. A000594, A007659, A299171, A299204, A299205.

Programs

Mathematica

Select[ Prime@ Range@ 30, Mod[ RamanujanTau@#, # - 1] == 0 &] (* Robert G. Wilson v, Feb 11 2018 *)

PARI

isok(p) = isprime(p) && !(ramanujantau(p) % (p-1)); \\ Michel Marcus, Feb 05 2018